Soluble salts of the anhydro-oxymethylen-diphosphoric acid and process of making same.



UNITED sTATns PATENT oFFioE.

SWIGEL POSTERNAK, OF PARIS, FRANCE, ASSIGN OR TO THE FIRM OF SOCIETY OF CHEMICAL INDUSTRY IN BASLE, OF BASEL, SWITZERLAND.

OF MAKING SAME.

Specification of Letters Patent. Patented May 5, 1908.

Filed January 17, 1905.. Serial No. 241,522. (Specimena) I In a similar way'a unitary, soluble magne- Io all whom it may concern:

' slum, strontium, barium or manganese salt,

' Be it known that I, SWIGEL PosTERNAK, a

citizen of the French Republic, and resident of Paris, in the Republic of'France, have invented certain new and useful Soluble Salts of the Anhydro-Oxymethylen-Diphosphoric Acid and a Process for the Manufacture of tribasic or tetrabasic lime salts of the anhydrooxymeth len-diphosphoric acid (see Complies Rendus e ZAcaderme clea- Sciences 1903 Vol. 137 p. 202 & 337), are dissolved in about thirty liters of muriatic acid of ten per cent.; that is, in more than the uantity of acid which is necessary for trans orming the said salts, insoluble inwater, into bibasic salts. The solution is then filtered, and recipitated b the addition of about thirty-five liters of acohol of ninety-five per cent. The precipitate is filtered and pressed, and the pressed cakes are again mixed with alcohol, filtered once more, and then dried in a vacuum at fifty to sixty degrees. Thus is obtained a snow-white powder which is fully soluble in water, and which consists of the new, pure, bicaloic-salt of the organic assimilable phosphorous compound of. the vegetable food stuffs. Its formula is C,P,,H,,O,,a. It contains about 22.5 per cent. of hosphorus and 14.5 per cent. of calcium. 'T 6 same result is obtained if there is taken, instead of muriatic acid, the equivalent quantity of nitric acid.

of the same organic phosphorous compound, can be produced when, in the foregoing example, the insoluble lime salt of the said compound is replaced by a corresponding salt of magnesium, strontium, lithium, bariwrhich is insoluble in water. I

What I-claim is 1. The improved rocess'for the produc;

tion of a unitary solu 1e salt of theanhydrooxymethylen-diphosphoric acid contained in vegetablefood stuffs, which consists in dissolving a corresponding salt, which is insoluble in water, in more than that quantity of an acid which is necessary for transforming the said salt into 'a bibasic salt, preci- 'itating .the soluble bibasic salt of the, anhy ro-oxymethylendiphos horic acid from the 'solu,-' tion thus obtaine by the addition of alcoholthereto, isolating the precipitate byvfiltra- 'tion, rinsing the same with alcohol, and

finally drying the product.

2. As a'new product, a unitary acid salt of the anhydro oxymethylen diphosphoric acid contained in vegetable food stuffs, correspondirig substantially to the formula.

(QHJQO X (in which X stands for a metal) Which constitutes, in dry state, a white powder, soluble in water and containing more than 20 phorus.

In witness whereof I have hereunto signed my name this third day of January 1905, in the presence of two subscribing 'witnesses.

RSWLIGEL POSTERNAK.

Witnesses:

EDWARD W.- IEHL, ARQHIBALD .BAKER.

per cent. of its own'weight of phos- 

